Aquaporin Function
Aquaporin Function - Related Videos
01:25
Aquaporins
0 Views •
2023
Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
04:21
An Assay to Detect Serum Anti-aquaporin-4 Immunoglobulin G
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2025
The video demonstrates a cell-based assay for detecting anti-aquaporin-4 immunoglobulin G using a biochip containing untransfected cells and transfected cells expressing aquaporin-4. This method has applications in diagnosing neuromyelitis optica spectrum disorders, confirmed by strong green fluorescence on the biochip.
01:56
Inducing Paralysis in a Mouse Model via Transfer of Aquaporin-4-Specific Th17 Cells
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2025
This video demonstrates the procedure of inducing paralysis by transferring activated Th17 cells targeting aquaporin-4 into a mouse model. In the central nervous system, the activated Th17 cells interact with aquaporin-4-expressing astrocytes, triggering an immune response that leads to tail and limb paralysis in the mouse.
09:29
Induction of Paralysis and Visual System Injury in Mice by T Cells Specific for Neuromyelitis Optica Autoantigen Aquaporin-4
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Cited by 10 •
2017
Here, we present a protocol to induce paralysis and opticospinal inflammation by transfer of aquaporin-4 (AQP4)-specific T cells from AQP4-/- mice into WT mice. In addition, we demonstrate how to use serial optical coherence tomography to monitor visual system dysfunction.
05:45
Human Serum Anti-aquaporin-4 Immunoglobulin G Detection by Cell-based Assay
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Cited by 5 •
2019
Cell-based assay is a widely used method to detect serum anti-aquaporin-4 immunoglobulin G. This method could be applied to clinical diagnosis and scientific researches of neuromyelitis optical spectrum disorders.
FAQs
Selectivity depends on the channel’s narrow pore, which organizes water molecules so they pass through in single file. This arrangement permits rapid water movement while preventing ions and protons from crossing the membrane through the same pathway. The result is controlled membrane permeability that supports hydration and volume regulation without allowing unrestricted solute movement.
Aquaporin-mediated transport is driven by osmotic and hydrostatic gradients rather than by cellular energy input. Differences in solute-related water balance or physical pressure provide the force for water movement across the membrane. Consequently, aquaporins can support rapid fluid transfer while avoiding the direct energy requirement associated with active transport processes.
Selective transport allows aquaporins to change water distribution without simultaneously permitting ions and protons to cross through the channel. That separation is important because water movement can influence cell volume and tissue hydration while preserving the membrane’s exclusion of these charged particles. Aquaporin activity therefore links membrane permeability with broader osmoregulatory control.
The location and activity of aquaporins determine where rapid water transfer can contribute to fluid movement. Examining these properties helps connect membrane-level transport with cell volume, tissue hydration, and organ-level water handling. This perspective is useful in biology because the same channel function can have different consequences in kidneys, brain tissue, or plant vascular tissues.
Kidney-focused research can examine how aquaporin distribution and activity relate to fluid movement and tissue hydration. These investigations provide context for understanding osmoregulation and kidney disease, where altered water handling is scientifically relevant. The channels therefore serve as a link between membrane transport mechanisms and broader questions about how renal tissues manage water.
In plants, aquaporins are relevant to water movement associated with vascular tissues. Studying their distribution and activity can help researchers relate membrane water transport to plant water relations and osmoregulation. This subject-specific context extends aquaporin research beyond animal organs and helps explain how selective water pathways participate in the movement of water through plant systems.
Aquaporin research has applications in two distinct areas. In biology and disease research, channel distribution and activity provide a framework for investigating brain swelling and tissue hydration. In technology, the selective passage of water and exclusion of ions and protons offers a biological model for biomimetic membrane technologies, which seek to reflect useful membrane transport properties.